1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#
# Test lock taken
#
BACKUP LOCK test.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock test t1
BACKUP UNLOCK;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
BACKUP LOCK t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock test t1
BACKUP UNLOCK;
BACKUP LOCK non_existing.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock non_existing t1
BACKUP UNLOCK;
#
# Test that backup lock protects against ddl
#
connect con1,localhost,root,,;
connection default;
create table t1 (a int) engine=innodb;
insert into t1 values (1);
backup lock t1;
select * from t1;
a
1
connection con1;
drop table t1;
connection default;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock test t1
MDL_INTENTION_EXCLUSIVE Schema metadata lock test
select * from t1;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
backup unlock;
#
# BACKUP LOCK and BACKUP UNLOCK are not allowed in procedures.
#
CREATE PROCEDURE p_BACKUP_LOCK()
BEGIN
BACKUP LOCK;
END|
ERROR 0A000: BACKUP LOCK is not allowed in stored procedures
CREATE PROCEDURE p_BACKUP_UNLOCK()
BEGIN
BACKUP UNLOCK;
END|
ERROR 0A000: BACKUP UNLOCK is not allowed in stored procedures
#
# BACKUP STAGE doesn't work when a BACKUP LOCK is active.
#
CREATE TABLE t1 (a INT);
BACKUP LOCK t1;
BACKUP STAGE START;
ERROR HY000: Can't execute the query because you have a conflicting read lock
BACKUP UNLOCK;
DROP TABLE t1;
#
# FLUSH TABLES WITH READ LOCK is not allowed when BACKUP LOCK is active.
#
CREATE TABLE t1 (a INT);
BACKUP LOCK t1;
FLUSH TABLES t1 WITH READ LOCK;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
BACKUP UNLOCK;
BACKUP LOCK t1;
FLUSH TABLES WITH READ LOCK;
BACKUP UNLOCK;
UNLOCK TABLES;
DROP TABLE t1;
#
# MDEV-20945 BACKUP UNLOCK assertion failures.
#
# Scenario 1.
CREATE TABLE t1 (a INT);
BACKUP LOCK t1;
FLUSH TABLE t1 WITH READ LOCK;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
UNLOCK TABLES;
BACKUP UNLOCK;
DROP TABLE t1;
# Scenario 2.
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (b INT);
LOCK TABLES t2 AS a2 WRITE;
BACKUP LOCK t1;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
UNLOCK TABLES;
INSERT INTO t1 VALUES(0);
# restart
DROP TABLE t1;
DROP TABLE t2;
# Scenario 3.
CREATE TEMPORARY TABLE t3 (c INT);
BACKUP LOCK t1;
SET @@SESSION.profiling=ON;
CREATE TABLE t1 (c INT);
ERROR HY000: Can't execute the query because you have a conflicting read lock
LOCK TABLES t3 AS a1 READ, t1 AS a3 READ, t3 AS a5 READ LOCAL;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
UNLOCK TABLE;
# restart
# Scenario 4.
CREATE TABLE t (c INT);
BACKUP LOCK not_existing.t;
LOCK TABLES t WRITE;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
UNLOCK TABLES;
# restart
DROP TABLE t;
# Scenario 5.
BACKUP LOCK t1;
CREATE TABLE t2 (c1 TIME, c2 TIME, c3 DATE, KEY(c1, c2));
ERROR HY000: Can't execute the query because you have a conflicting read lock
LOCK TABLE t2 READ;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
# restart
# Scenario 6.
BACKUP LOCK t;
CREATE VIEW v AS SELECT 1;
ERROR HY000: Can't execute the query because you have a conflicting read lock
LOCK TABLES v READ;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
START TRANSACTION READ ONLY;
BACKUP LOCK t;
# restart
# Scenario 7.
SET SQL_MODE='';
SET STATEMENT max_statement_time=180 FOR BACKUP LOCK test.u;
CREATE TABLE t (a INT) ENGINE=Aria;
ERROR HY000: Can't execute the query because you have a conflicting read lock
CREATE TEMPORARY TABLE IF NOT EXISTS s (c INT) ENGINE=Aria;
LOCK TABLES s AS a READ LOCAL,t AS b WRITE;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
SET STATEMENT max_statement_time=180 FOR BACKUP LOCK test.u;
# restart
#
connection con1;
connection default;
disconnect con1;
show tables;
Tables_in_test
#
# MDEV-22879 SIGSEGV (or hang) in free/my_free from
# _ma_end_block_record (on optimized builds)
#
SET STATEMENT max_statement_time=20 FOR BACKUP LOCK test.t1;
CREATE TABLE IF NOT EXISTS t3 (c1 CHAR(1) BINARY,c2 SMALLINT(10),c3 NUMERIC(1,0), PRIMARY KEY(c1(1))) ENGINE=InnoDB;
ERROR HY000: Can't execute the query because you have a conflicting read lock
BACKUP UNLOCK;
CREATE TABLE IF NOT EXISTS t3 (c1 CHAR(1) BINARY,c2 SMALLINT(10),c3 NUMERIC(1,0), PRIMARY KEY(c1(1))) ENGINE=InnoDB;
SET STATEMENT max_statement_time=20 FOR BACKUP LOCK test.t1;
LOCK TABLES t3 AS a2 WRITE, t3 AS a1 READ LOCAL;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
DROP TABLE t3;
ERROR HY000: Can't execute the query because you have a conflicting read lock
BACKUP UNLOCK;
DROP TABLE t3;
#
# End of MariaDB 10.4 tests
#